Process of forming artificial pearls



TATSUI-IEI MISE, 0F

KABUSHIKI KWAISHfi, JAPAN.

WATAKANO, 3A.?All', ASSIGNSRITG DAT-NIPPON ENKEI SHINJU' 0F SI-IIMO-QCHIAI-IVIURA, TOYOTAIVIA-GUN, TOKYO-FIT,

PROCESS OF FORMING ARTIFTGIAL PEARLS.

1\To Drawing. Application filed 'Ik'iay 7,

To all whom it may concern.

Be it known that I, TATSUHEI Mien, a subject of the Empire of Japan, residing at No. 42 Yashiki, vVatakano, Matoya-Mura, Shima-Gun, Miye-Ken, Japan, have invented certain new and useful Improvements in Processes of Forming Artificial Pearls, of which the following is a specification. I

This invention relates to'improvem'ents in the process of forming artificial pearls in which the shell and the muscles of the foot of a pearl producing mollusk are opened at the point where the internal organ and the mantle are connected, and where these parts touch each other a sack-like space is formed into which a kernel is inserted. hen the case requires, several capillary holes, extending from the bottom of said space toward the epidermis of the mantle, are also formed, and in such case, the kernel is positioned so that its surface touches the ends of said capillary holes. Subsequent to the insertion of the kernel the mollusk is placed in the nursery for a certain period to allow for the formation of an artificial pearl. The invention has for its principal object to effect an opening without lacerating the mantle and one which will easily heal subsequent to the insertion of .the kernel. In addition, by the provision of the opening the migratory action of the epithelia of the mantle toward the surface of the kernel is accelerated to insure of an effective and sure formation of pearl.

The following is an instance of practising the present process A pearl producing mollusk is taken, and its shell is first opened by a proper tool, and then the muscles of foot are longitudinally opened by a sharp tool from the longitudinal tissue portion near their labial palp along the direction of the tissues, and then the limiting membrane of liver is opened. This cutting operation is continued along said membrane, care being taken not to injure the substance of liver, to that portion, which touches the inner surface of the mantle at the point where the mantle is connected with the substance of liver and the tissues of the generative organ thus forming a sack-likespace, into which a. kernel is in- .scrted. Moreover, if desired, several capillary holes, extending from the bottom of Specification of Letters Patent. Patented Sept, 28, 1920.

1919. Serial No. 295,506. I

.the openingis'necessarily larger than the diameterof the kernel, and besides, when the mantle is injured the muciferoussecr tion 1s great, and the kernel, in many cases, will consequently come out from the opening. Therefore, it will be seen that-in the old process, it is practically impossible to attain the effective pearl-formation.

Now, in the present invention any laceration of the mantle is avoided and as already stated, from the muscles of foot, the opening is started in the direction of the tissues, and a sack-like space is formed at the point where the internal organ and the mantle are connected, and where these parts touch each other, while subsequently a kernel is inserted in the sack-like space mentioned. Also, when occasion requires, capillary holes eX- tending from the bottom of said space toward the epidermis of the mantle, are formed, and the kernel inserted in said space, being, in this case, so placed that its surface touches the ends of capillary holes. Accordingly, the kernel, due to the construction of the muscles, is prevented from coming back, and is securely kept in the right place. This is the great characteristic fea-, ture of the invention. d/Vhen an inorganic solid substance is inserted in the position as specified in the present process, the fission of the epithelia of the. mantle quickly takes place by the protective function of the mollusk, and in such position, the secretion of the nacreous matter is more active than in the free portion of the mantle where the insertion is usually made. Consequently the deposition of said matter on the substance is so conspicuous, that the latter is easily encysted. In the case where the kernel is made to touch the capillary holes, the epithelia of the mantle, due to the irritation subsequent to the formation of capillary holes, will make fission, and the divided cells ever multiplying will move toward the ker V nel, so that the latter is completely encysted,

and the capillary holes will soon be adhered by differentiation as Well as by assimilation of? the cells. As a result, in the course of a few days in the nursery, a single pearl-sack consisting of the epithelia of the mantle is formed around the kernel. According to this process, an artificial pearl-sack necessary for pearl-formation is quickly formed around the kernel.

In short, this process is most suitable for forming with a certainty a round pearl in a very short time.

Claims 1. A process of forming pearls consisting of first opening the shell of the pearl producing mollusk, then opening the muscle of the foot of the mollusk, then forming a sacklike space at the point where the internal organ is connected with the mantle and finally inserting a kernel through the opening and into the space provided.

2. A process of forming pearls consisting of first opening the shell of any pearl producing mollusk, then opening the muscles of the foot of the mollusk longitudinally from the tissue portion near the labial palp mantle is connected with along the direction of the tissues to form a sacklike space in the portion Where the the substance of the liver and the tissue of the generative organ of the mollusk, and finally inserting a kernel in the sack-like space provided.

3. A process of forming pearls consisting in the opening of the shell'of a pearl producing mollusk, then opening the muscles of thefoot of the mollusk at the point where the internal organ and the mantle are con nected and Where the organ touches the inner surface of the mantle to form a sack-like space, then forming a plurality of capillary holes extendin trom the bottom of the space toward the epidermis of the mantle and finally inserting a kernel into the space so that its surface touches the ends of the capillary holes.

In testimony whereof I have affixed my signature in presence of two witnesses.

TATSUHEI MISE.

l/Vitnesses DEN Kmo, EISHIRO ABE. 

